超短激光脉冲的自适应整形放大研究

Adaptive pulse shaping amplification for ultra-short laser pulses

对基于掺镱光纤放大器的自适应脉冲整形啁啾脉冲放大(CPA,chirped pulse amplifier)系统用于超短脉冲形状自适应控制的可行性和有效性进行了研究,并引入多目标全局优化算法对脉冲形状和特性的多参数优化进行了分析。结果表明输出脉冲与目标脉冲波形的均方根误差和互相关系数都能实时有效地控制输出脉冲形状,并可与1/e2脉宽一起进行双目标优化得到特定形状的高能超短激光脉冲输出。

Adaptive pulse shaping CPA system based on Yb-doped fiber amplifier is studied, particularly its application probability and validity in automatic controlling of the output pulse shape. Multi-objective global algorithm is introduced to optimize the output pulse characters together with its shape. Numerical results show that both the root-mean-square error and cross correlation coefficient between the output pulse and the target pulse can provide effective and real-time controlling for the output pulse shape. And for multi-objective optimization, 1/e2 pulse width is a good choice to obtain high energy and ultra-short laser pulses with controlled shapes.